realm::util::EncryptedFileMapping::read_barrier

[ganesh-ananthan]

Application getting crash intermittently after upgraded to version 5.3.6 and 5.4.0.

Realm framework version: 5.4.0 Xcode version: 11.2 iOS/OSX version: 13.7 Dependency manager + version: CocoaPod Latest

Incident Identifier: 901c3fd7-625d-4173-95a0-80f6da312643 CrashReporter Key: B5E6761D-6702-4CC1-A55F-EDF920BD93A9 Hardware Model: iPhone8,2 Process: AppName [377] Path: /private/var/containers/Bundle/Application/3F38930D-33A7-4029-BBCC-755A766D8177/AppName.app/AppName Identifier: com.domain.phone2 Version: 4.0.955 (4.0.955) Code Type: arm64 Parent Process: ??? [1]

Date/Time: 2020-09-13T19:18:20.999Z Launch Time: 2020-09-13T18:52:06Z OS Version: iPhone OS 13.7 (17H35) Report Version: 104

Exception Type: SIGSEGV Exception Codes: SEGV_ACCERR at 0x1a Crashed Thread: 24

Thread 24 Crashed: 0 Realm 0x00000001023f1f70 realm::util::EncryptedFileMapping::readbarrier(void const, unsigned long, unsigned long (_)(char const)) + 32 1 Realm 0x00000001020de844 realm::util::do_encryption_readbarrier(void const, unsigned long, unsigned long ()(char const), realm::util::EncryptedFileMapping_) (file_mapper.hpp:133) 2 Realm 0x00000001023c73e0 realm::Table::init(unsigned long, realm::ArrayParent, unsigned long, bool, bool) + 516 3 Realm 0x0000000102322efc realm::Group::create_table_accessor(unsigned long) + 752 4 Realm 0x0000000102322bac realm::Group::do_get_table(unsigned long) + 92 5 Realm 0x00000001020f2714 realm::ObjectSchema::ObjectSchema(realm::Group const&, realm::StringData, realm::TableKey) (group.hpp:1169) 6 Realm 0x00000001020f9cb0 realm::ObjectStore::schema_from_group(realm::Group const&) (memory:1826) 7 Realm 0x00000001021dce64 realm::Realm::read_schema_from_group_if_needed() (shared_realm.cpp:202) 8 Realm 0x00000001021dd2e0 realm::Realm::begin_read(realm::VersionID) (shared_realm.cpp:138) 9 Realm 0x00000001021dd1ac realm::Realm::read_group() (shared_realm.cpp:97) 10 Realm 0x00000001021de0b8 realm::Realm::do_refresh() (shared_realm.cpp:858) 11 Realm 0x00000001021ae1b0 -[RLMRealm refresh] (RLMRealm.mm:818) 12 RealmSwift 0x000000010292f604 RealmSwift.Realm.refresh() -> Swift.Bool (Realm.swift:754) 13 AppName 0x0000000100e1f238 function signature specialization <Arg[0] = Dead> of generic specialization of AppName.UnifiedDatabase.(realm in _15EE5ABE828ED209C1CFF5BDEB0C36C4).getter : RealmSwift.Realm? (UnifiedDatabase.swift:31) 14 AppName 0x0000000100e1b680 function signature specialization <Arg[3] = Dead> of generic specialization of AppName.UnifiedDatabase.fetch(predicate: __C.NSPredicate?, sortDescriptors: [RealmSwift.SortDescriptor]?, count: Swift.Int?) > [A.ModelType] (<compilergenerated>:0) 15 AppName 0x00000001002d8d70 closure #1 (AppName.ConversationModel) -> Swift.Bool in closure #1 ([AppName.ConversationModel]) > () in closure #3 (Swift.String) > () in AppName.MessagesDao.rx_initializeAllConversations(completion: (AppName.ItemResult) > (), onInitialLoadComplete: () > ()) > () (<compilergenerated>:0) 16 AppName 0x00000001002d8748 closure #1 ([AppName.ConversationModel]) > () in closure #3 (Swift.String) > () in AppName.MessagesDao.rx_initializeAllConversations(completion: (AppName.ItemResult) > (), onInitialLoadComplete: () > ()) > () (<compilergenerated>:0) 17 AppName 0x000000010030c35c partial apply forwarder for reabstraction thunk helper from @escaping @callee_guaranteed (@guaranteed [AppName.ConversationModel]) -> (@error @owned Swift.Error) to @escaping @callee_guaranteed (@in_guaranteed [AppName.ConversationModel]) > (@out (), @error @owned Swift.Error) (<compilergenerated>:0) 18 RxSwift 0x0000000102d66ac0 RxSwift.(MapSink in _5428EFA9A9B0C0340021B871D2E5AC01).on(RxSwift.Event) -> () (Map.swift:43) 19 RxSwift 0x0000000102d66c94 protocol witness for RxSwift.ObserverType.on(RxSwift.Event<A.Element>) > () in conformance RxSwift.(MapSink in _5428EFA9A9B0C0340021B871D2E5AC01)<A, B> : RxSwift.ObserverType in RxSwift (<compilergenerated>:0) 20 RxSwift 0x0000000102d73ad4 partial apply forwarder (:0) 21 RxSwift 0x0000000102d8fd00 partial apply forwarder for reabstraction thunk helper <A1 where A == A1.Element, A1: RxSwift.ObserverType> from @escaping @callee_guaranteed (@in_guaranteed RxSwift.Event) -> () to @escaping @callee_guaranteed (@in_guaranteed RxSwift.Event) > (@out ()) (<compilergenerated>:0) 22 RxSwift 0x0000000102d8ebe8 merged RxSwift.(ShareReplay1WhileConnectedConnection in _E9FE621655D67A613BF2FC2D9B3041FC).on(RxSwift.Event) -> () + 112 23 RxSwift 0x0000000102d8e714 protocol witness for RxSwift.ObserverType.on(RxSwift.Event<A.Element>) > () in conformance RxSwift.(ShareReplay1WhileConnectedConnection in _E9FE621655D67A613BF2FC2D9B3041FC) : RxSwift.ObserverType in RxSwift (<compilergenerated>:0) 24 RxSwift 0x0000000102d933b4 RxSwift.Sink.forwardOn(RxSwift.Event<A.Element>) -> () (Sink.swift:34) 25 RxSwift 0x0000000102d6be44 RxSwift.(MergeSinkIter in _DDEA0423368B3B462AE46699A4D080E1).on(RxSwift.Event<B.Element>) -> () (Merge.swift:394) 26 RxSwift 0x0000000102d6bfc8 protocol witness for RxSwift.ObserverType.on(RxSwift.Event<A.Element>) > () in conformance RxSwift.(MergeSinkIter in _DDEA0423368B3B462AE46699A4D080E1)<A, B, C> : RxSwift.ObserverType in RxSwift (<compilergenerated>:0) 27 RxSwift 0x0000000102d64e24 RxSwift.(Just in _BD9B9D4356C4038796FB16D0D54A9F8E).subscribe<A where A == A1.Element, A1: RxSwift.ObserverType>(A1) -> RxSwift.Disposable (Just.swift:83) 28 RxSwift 0x0000000102d6b4dc RxSwift.(MergeSink in _DDEA0423368B3B462AE46699A4D080E1).subscribeInner(RxSwift.Observable<B.Element>) -> () (Merge.swift:477) 29 RxSwift 0x0000000102d6b30c RxSwift.(MergeSink in _DDEA0423368B3B462AE46699A4D080E1).on(RxSwift.Event) -> () (Merge.swift:459) 30 RxSwift 0x0000000102d6c0f4 protocol witness for RxSwift.ObserverType.on(RxSwift.Event<A.Element>) > () in conformance RxSwift.(MergeSink in _DDEA0423368B3B462AE46699A4D080E1)<A, B, C> : RxSwift.ObserverType in RxSwift (<compilergenerated>:0) 31 RxSwift 0x0000000102d933b4 RxSwift.Sink.forwardOn(RxSwift.Event<A.Element>) -> () (Sink.swift:34) 32 RxSwift 0x0000000102d66b4c RxSwift.(MapSink in _5428EFA9A9B0C0340021B871D2E5AC01).on(RxSwift.Event) -> () (Map.swift:44) 33 RxSwift 0x0000000102d66c94 protocol witness for RxSwift.ObserverType.on(RxSwift.Event<A.Element>) > () in conformance RxSwift.(MapSink in _5428EFA9A9B0C0340021B871D2E5AC01)<A, B> : RxSwift.ObserverType in RxSwift (<compilergenerated>:0) 34 RxSwift 0x0000000102d933b4 RxSwift.Sink.forwardOn(RxSwift.Event<A.Element>) -> () (Sink.swift:34) 35 RxSwift 0x0000000102d5f7b4 RxSwift.(FilterSink in _172A575932639FDD42969ED91F7BE949).on(RxSwift.Event<A.Element>) -> () (Filter.swift:60) 36 RxSwift 0x0000000102d5f8e8 protocol witness for RxSwift.ObserverType.on(RxSwift.Event<A.Element>) > () in conformance RxSwift.(FilterSink in _172A575932639FDD42969ED91F7BE949) : RxSwift.ObserverType in RxSwift (<compilergenerated>:0) 37 RxSwift 0x0000000102d73ad4 partial apply forwarder (:0) 38 RxSwift 0x0000000102d8fd00 partial apply forwarder for reabstraction thunk helper <A1 where A == A1.Element, A1: RxSwift.ObserverType> from @escaping @callee_guaranteed (@in_guaranteed RxSwift.Event) -> () to @escaping @callee_guaranteed (@in_guaranteed RxSwift.Event) > (@out ()) (<compilergenerated>:0) 39 RxSwift 0x0000000102d8ebe8 merged RxSwift.(ShareReplay1WhileConnectedConnection in _E9FE621655D67A613BF2FC2D9B3041FC).on(RxSwift.Event) -> () + 112 40 RxSwift 0x0000000102d8e714 protocol witness for RxSwift.ObserverType.on(RxSwift.Event<A.Element>) > () in conformance RxSwift.(ShareReplay1WhileConnectedConnection in _E9FE621655D67A613BF2FC2D9B3041FC) : RxSwift.ObserverType in RxSwift (<compilergenerated>:0) 41 RxSwift 0x0000000102d72100 RxSwift.(ObserveOnSink in _277A93ABA8477198C125F3F26B2D4B62).run((), (()) > ()) > () (ObserveOn.swift:117) 42 RxSwift 0x0000000102d73340 partial apply forwarder for reabstraction thunk helper from @escaping @callee_guaranteed (@unowned @callee_guaranteed () -> ()) > () to @escaping @callee_guaranteed (@in_guaranteed (), @unowned @callee_guaranteed (@in_guaranteed ()) > ()) > () (<compilergenerated>:0) 43 RxSwift 0x0000000102d81130 partial apply forwarder for reabstraction thunk helper from @escaping @callee_guaranteed (@in_guaranteed A, @unowned @callee_guaranteed (@in_guaranteed A) -> ()) > () to @escaping @callee_guaranteed (@in_guaranteed A, @in_guaranteed @callee_guaranteed (@in_guaranteed A) > (@out ())) > (@out ()) (<compilergenerated>:0) 44 RxSwift 0x0000000102d80a68 closure #1 (A) -> RxSwift.Disposable in RxSwift.RecursiveImmediateScheduler.schedule(A) > () (<compilergenerated>:0) 45 RxSwift 0x0000000102d591d8 closure #1 () -> () in RxSwift.DispatchQueueConfiguration.schedule(_: A, action: (A) > RxSwift.Disposable) > RxSwift.Disposable (DispatchQueueConfiguration.swift:27) 46 RxSwift 0x0000000102d4c35c reabstraction thunk helper from @escaping @callee_guaranteed () -> () to @escaping @callee_unowned @convention(block) () > () (<compilergenerated>:0) 47 libdispatch.dylib 0x00000001bb2859a8 _dispatch_call_block_and_release + 20 48 libdispatch.dylib 0x00000001bb286524 _dispatch_client_callout + 12 49 libdispatch.dylib 0x00000001bb22ee98 _dispatch_continuation_pop$VARIANT$mp + 408 50 libdispatch.dylib 0x00000001bb22e5ec _dispatch_async_redirect_invoke + 652 51 libdispatch.dylib 0x00000001bb23b438 _dispatch_root_queue_drain + 372 52 libdispatch.dylib 0x00000001bb23bbf8 _dispatch_worker_thread2 + 120 53 libsystem_pthread.dylib 0x00000001bb2d7b38 _pthread_wqthread + 208 54 libsystem_pthread.dylib 0x00000001bb2da740 start_wqthread + 4

@jedelbo @finnschiermer Is this stack trace related to the latest core changes?

[jedelbo]

Not the latest changes. I think it looks like something we have seen before - I just can't find it.

[ganesh-ananthan]

@jedelbo is that resolved in any specific version. We adopted the latest Realm (5.3.6 followed by 5.4.0) to avoid the deadlock case on iOS 14.

Do we need to perform / modify any changes from application side to avoid the realm::util::EncryptedFileMapping::read_barrier issue ?

[jedelbo]

If you get this error, it is definitely a problem that should be solved in the storage engine. If you see this in v5.3.4, then the problem has not been solved.

[ganesh-ananthan]

Thanks @jedelbo , when can we expect the release with this fix? We don't like to fall back on deadlock crashes.

[finnschiermer]

Looks like https://github.com/realm/realm-core/pull/3838. (which was considered fixed - that's why you'd seen it before @jedelbo)

@ganesh-ananthan Are you using encryption in your app?

[ganesh-ananthan]

@finnschiermer No we are not using encryption. We kept the realm file in shared group directory and accessing from app and notification extension.

[finnschiermer]

@ganesh-ananthan Thx. This is a bug we cannot reproduce at the moment, so any additional observations, clues etc are very welcome. A repro case could make a huge difference.

[ganesh-ananthan]

We don't have a standard case to get this issue, we got this crash in different scenario where we do access the realm from different thread.

After update to latest Realm (5.3.6, 5.4.0) we do see such a crash. Here are points you can consider that we use Realm in our app

1. We don't have any serialisation for realm read and write.
2. We do use autoreleasepool for write activity.

[bguidolim]

This crash is happening since v5.0.0, I'm trying hard to find a way to reproduce, but it's totally random. I have 3 different crash reports with the same error, and the problem is almost always in the same line of code:

channel.messages.filter("syncInfo.id == %@", messageResponse.id).isEmpty 

After some investigation, I've seen this could be related to the Collection implementation of Realm, so I've changed the code above to this one:

channel.messages.filter("syncInfo.id == %@", messageResponse.id).map({ $0 }).isEmpty 

I was hoping that using a map and converting to a standard Swift array would solve the issue, but it didn't happen. I thought that this PR could also fix the issue: https://github.com/realm/realm-core/pull/3893 (no success)

Crash reports:

• https://gist.github.com/bguidolim/19e3d5097a7d25b03ffbf7a2008c9e3f
• https://gist.github.com/bguidolim/dd2e48c497d63bed40710abf1fe06246
• https://gist.github.com/bguidolim/988509d88affb6a0c73691aba711c9a7

[jedelbo]

This is most probably solved by https://github.com/realm/realm-core/pull/3935. At least the crashes reported just above.

[bguidolim]

@jedelbo as soon a new version is released, I'll update and observe. I hope we can finally close this issue.

Thanks.

[endore8]

Any updates on this? For me, it crashes quite often, especially when debugging with Simulator.

[leemaguire]

@Endore8 can you please update to version 5.4.5 and see if you still experience the issue?

[endore8]

@leemaguire, it stopped crashing continuously after updating to 5.4.5! Let's see how it is overtime 🤞

Update: after a few minutes got it again 😭

[leemaguire]

@Endore8 can you post a stacktrace of your crash?

[endore8]

@leemaguire Once it crashes once, it starts crashing continuously. I think I found a fix that works for my case. I was mapping Realm objects a few times. Doing the mapping once to a Swift object and converting that result to Array solves it.

// This crashes
if let objects = realm?.objects(MyObject.self).sorted(byKeyPath: "order") {           
    let max = (objects.map { max($0.down, $0.up) }.max() ?? 0)
    let relative = Array(objects.map { CGFloat($0.down) / CGFloat(max) }) // This line crashes

     ...

// This works fine
if let objects = realm?.objects(MyObject.self).sorted(byKeyPath: "order") {           
    let mapped = Array(objects.map { ($0.down, $0.up) })
    let relative = mapped.map { CGFloat($0.0) / CGFloat(max) }
     ...

This is the stack trace:

▿ 36 elements
  - 0 : "0   ???                                 0x000000013f2df728 0x0 + 5354944296"
  - 1 : "1   Usage                               0x0000000107feeda0 main + 0"
  - 2 : "2   Realm                               0x0000000109fcaf10 _ZN5realm4util26do_encryption_read_barrierEPKvmPFmPKcEPNS0_20EncryptedFileMappingE + 64"
  - 3 : "3   Realm                               0x000000010a505578 _ZNK5realm16ClusterNodeInner10find_childENS_6ObjKeyERNS0_9ChildInfoE + 248"
  - 4 : "4   Realm                               0x000000010a505147 _ZNK5realm16ClusterNodeInner7try_getENS_6ObjKeyERNS_11ClusterNode5StateE + 55"
  - 5 : "5   Realm                               0x000000010a50432c _ZNK5realm11ClusterNode3getENS_6ObjKeyERNS0_5StateE + 28"
  - 6 : "6   Realm                               0x000000010a510ab6 _ZN5realm11ClusterTree3getENS_6ObjKeyE + 54"
  - 7 : "7   Realm                               0x0000000109fef23d _ZN5realm5Table10get_objectENS_6ObjKeyE + 61"
  - 8 : "8   Realm                               0x000000010a0bb619 _ZN5realm9TableView3getEm + 329"
  - 9 : "9   Realm                               0x000000010a0b249c _ZN5realm7Results7try_getINS_3ObjEEENS_4util8OptionalIT_EEm + 780"
  - 10 : "10  Realm                               0x000000010a0b1ff0 _ZN5realm7Results3getINS_3ObjEEET_m + 96"
  - 11 : "11  Realm                               0x000000010a116599 _ZZN5realm7Results3getI18RLMAccessorContextEEDaRT_mENKUlS4_E_clIPNS_3ObjEEES3_S4_ + 57"
  - 12 : "12  Realm                               0x000000010a1161c0 _ZN5realmL14switch_on_typeINS_3ObjEZNS_7Results3getI18RLMAccessorContextEEDaRT_mEUlS6_E_EES5_NS_12PropertyTypeEOT0_ + 1152"
  - 13 : "13  Realm                               0x000000010a115d33 _ZNK5realm7Results8dispatchIZNS0_3getI18RLMAccessorContextEEDaRT_mEUlS5_E_EES4_OS5_ + 51"
  - 14 : "14  Realm                               0x000000010a110788 _ZN5realm7Results3getI18RLMAccessorContextEEDaRT_m + 56"
  - 15 : "15  Realm                               0x000000010a11056d -[RLMFastEnumerator countByEnumeratingWithState:count:] + 285"
  - 16 : "16  Realm                               0x000000010a11095f _Z16RLMFastEnumerateP22NSFastEnumerationStatemPU28objcproto17RLMFastEnumerable11objc_object + 239"
  - 17 : "17  Realm                               0x000000010a2640a2 -[RLMResults countByEnumeratingWithState:objects:count:] + 114"
  - 18 : "18  libswiftFoundation.dylib            0x000000010dcb6db9 $s10Foundation25NSFastEnumerationIteratorV4nextypSgyF + 249"
  - 19 : "19  RealmSwift                          0x000000010b76a54d $s10RealmSwift11RLMIteratorV4nextxSgyF + 141"
  - 20 : "20  RealmSwift                          0x000000010b76ac19 $s10RealmSwift11RLMIteratorVyxGStAASt4next7ElementQzSgyFTW + 9"
  - 21 : "21  libswiftCore.dylib                  0x000000010d5b4085 $ss15LazyMapSequenceV8IteratorV4nextq_SgyF + 197"
  - 22 : "22  libswiftCore.dylib                  0x000000010d5b4149 $ss15LazyMapSequenceV8IteratorVyxq__GStsSt4next7ElementQzSgyFTW + 9"
  - 23 : "23  libswiftCore.dylib                  0x000000010d4ff194 $ss30_copySequenceToContiguousArrayys0dE0Vy7ElementQzGxSTRzlF + 756"
  - 24 : "24  libswiftCore.dylib                  0x000000010d6aaa18 $ss12Zip2SequenceVyxq_GSTsST22_copyToContiguousArrays0eF0Vy7ElementQzGyFTW + 24"
  - 25 : "25  libswiftCore.dylib                  0x000000010d496513 $sSaySayxGqd__c7ElementQyd__RszSTRd__lufC + 19"
  - 26 : "26  Usage                               0x0000000108437530 $s5Usage27LiveConnectionDataProcessorC7process33_47B6747D7239E587A3E1442329587641LL9dataFetch08previousdM05realm7Combine6FutureCyAA0C8ActivityVs5NeverOGAA0dM0V_ARSg10RealmSwift0T0VSgyctFyys6ResultOyAmOGccfU_yycfU_ + 4336"
  - 27 : "27  Usage                               0x000000010843949b $s5Usage27LiveConnectionDataProcessorC7process33_47B6747D7239E587A3E1442329587641LL9dataFetch08previousdM05realm7Combine6FutureCyAA0C8ActivityVs5NeverOGAA0dM0V_ARSg10RealmSwift0T0VSgyctFyys6ResultOyAmOGccfU_yycfU_TA + 139"
  - 28 : "28  Usage                               0x00000001080161a0 $sIeg_IeyB_TR + 48"
  - 29 : "29  libdispatch.dylib                   0x000000010e2638ac _dispatch_call_block_and_release + 12"
  - 30 : "30  libdispatch.dylib                   0x000000010e264a88 _dispatch_client_callout + 8"
  - 31 : "31  libdispatch.dylib                   0x000000010e266f06 _dispatch_queue_override_invoke + 1032"
  - 32 : "32  libdispatch.dylib                   0x000000010e2765b6 _dispatch_root_queue_drain + 351"
  - 33 : "33  libdispatch.dylib                   0x000000010e276f1b _dispatch_worker_thread2 + 135"
  - 34 : "34  libsystem_pthread.dylib             0x000000010e72c9f7 _pthread_wqthread + 220"
  - 35 : "35  libsystem_pthread.dylib             0x000000010e72bb77 start_wqthread + 15"

[owenzhao]

Just encounter the same issue on Realm Cocoa 5.4.1.

Process:               Poster 2 [730]
Path:                  /Applications/Poster 2.app/Contents/MacOS/Poster 2
Identifier:            com.parussoft.Poster
Version:               2.7.4 (20200922)
App Item ID:           1290194604
App External ID:       837841031
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Poster 2 [730]
User ID:               501

Date/Time:             2020-09-30 09:10:18.699 +0800
OS Version:            Mac OS X 10.15.7 (19H2)
Report Version:        12
Anonymous UUID:        AD850017-567A-FF99-4F9D-76EE552DECAA

Sleep/Wake UUID:       FF616602-559D-4F2A-89AA-C5D08D2002C9

Time Awake Since Boot: 62000 seconds
Time Since Wake:       8800 seconds

System Integrity Protection: enabled

Crashed Thread:        3  Dispatch queue: com.yannickloriot.asyncqueue

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x00000000000001a3
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [730]

VM Regions Near 0x1a3:
--> 
    __TEXT                 000000010d5dd000-000000010d671000 [  592K] r-x/r-x SM=COW  /Applications/Poster 2.app/Contents/MacOS/Poster 2

Thread 0:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib          0x00007fff6ed19a12 __msync + 10
1   org.cocoapods.Realm.macosx      0x000000010db4a5d0 realm::util::msync(int, void*, unsigned long) + 208
2   org.cocoapods.Realm.macosx      0x000000010da68254 realm::GroupWriter::commit(unsigned long) + 356
3   org.cocoapods.Realm.macosx      0x000000010da5c822 realm::DB::low_level_commit(unsigned long long, realm::Transaction&) + 562
4   org.cocoapods.Realm.macosx      0x000000010da5c58b realm::DB::do_commit(realm::Transaction&) + 107
5   org.cocoapods.Realm.macosx      0x000000010da5cc91 realm::Transaction::commit_and_continue_as_read() + 81
6   org.cocoapods.Realm.macosx      0x000000010d7d9fe1 realm::_impl::RealmCoordinator::commit_write(realm::Realm&) + 87 (realm_coordinator.cpp:745)
7   org.cocoapods.Realm.macosx      0x000000010d8b25d0 realm::Realm::commit_transaction() + 150 (shared_realm.cpp:675)
8   org.cocoapods.Realm.macosx      0x000000010d87dd48 -[RLMRealm commitWriteTransactionWithoutNotifying:error:] + 389 (RLMRealm.mm:705)
9   org.cocoapods.RealmSwift.macosx 0x000000010e0da5fd Realm.write<A>(withoutNotifying:_:) + 381 (Realm.swift:232)
10  com.parussoft.Poster            0x000000010d5f35fb specialized SaveDelegate.updateProfile(_:accountType:) + 747
11  com.parussoft.Poster            0x000000010d5f3835 specialized SaveDelegateViewController.updateProfile(_:) + 373 (SaveDelegateViewController.swift:57)
12  com.parussoft.Poster            0x000000010d5f206c @objc SaveDelegateViewController.saveAccount(_:) + 108
13  com.apple.CoreFoundation        0x00007fff34b2f80f __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
14  com.apple.CoreFoundation        0x00007fff34b2f7a3 ___CFXRegistrationPost1_block_invoke + 63
15  com.apple.CoreFoundation        0x00007fff34b2f718 _CFXRegistrationPost1 + 372
16  com.apple.CoreFoundation        0x00007fff34b2f384 ___CFXNotificationPost_block_invoke + 80
17  com.apple.CoreFoundation        0x00007fff34aff4fd -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1554
18  com.apple.CoreFoundation        0x00007fff34afe9a9 _CFXNotificationPost + 1351
19  com.apple.Foundation            0x00007fff3717c786 -[NSNotificationCenter postNotificationName:object:userInfo:] + 59
20  com.parussoft.SharingAPI        0x000000010e2a84d1 closure #2 in TwitterAPI.retrieveKeysAndValuesServerReturns(from:) + 417
21  com.parussoft.SharingAPI        0x000000010e2b500b partial apply for closure #3 in TwitterAPI.retrieveKeysAndValuesServerReturns(from:) + 43
22  com.parussoft.SharingAPI        0x000000010e2b524e thunk for @escaping @callee_guaranteed () -> () + 14
23  libdispatch.dylib               0x00007fff6eb796c4 _dispatch_call_block_and_release + 12
24  libdispatch.dylib               0x00007fff6eb7a658 _dispatch_client_callout + 8
25  libdispatch.dylib               0x00007fff6eb85cab _dispatch_main_queue_callback_4CF + 936
26  com.apple.CoreFoundation        0x00007fff34b78e81 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
27  com.apple.CoreFoundation        0x00007fff34b38c87 __CFRunLoopRun + 2028
28  com.apple.CoreFoundation        0x00007fff34b37e3e CFRunLoopRunSpecific + 462
29  com.apple.HIToolbox             0x00007fff33764abd RunCurrentEventLoopInMode + 292
30  com.apple.HIToolbox             0x00007fff337647d5 ReceiveNextEventCommon + 584
31  com.apple.HIToolbox             0x00007fff33764579 _BlockUntilNextEventMatchingListInModeWithFilter + 64
32  com.apple.AppKit                0x00007fff31daa039 _DPSNextEvent + 883
33  com.apple.AppKit                0x00007fff31da8880 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352
34  com.apple.AppKit                0x00007fff31d9a58e -[NSApplication run] + 658
35  com.apple.AppKit                0x00007fff31d6c396 NSApplicationMain + 777
36  com.parussoft.Poster            0x000000010d5e2b89 main + 9 (AppDelegate.swift:15)
37  libdyld.dylib                   0x00007fff6ebd3cc9 start + 1

Thread 1:: com.apple.NSEventThread
0   libsystem_kernel.dylib          0x00007fff6ed14dfa mach_msg_trap + 10
1   libsystem_kernel.dylib          0x00007fff6ed15170 mach_msg + 60
2   com.apple.CoreFoundation        0x00007fff34b39ef5 __CFRunLoopServiceMachPort + 247
3   com.apple.CoreFoundation        0x00007fff34b389c2 __CFRunLoopRun + 1319
4   com.apple.CoreFoundation        0x00007fff34b37e3e CFRunLoopRunSpecific + 462
5   com.apple.AppKit                0x00007fff31f4b954 _NSEventThread + 132
6   libsystem_pthread.dylib         0x00007fff6edd8109 _pthread_start + 148
7   libsystem_pthread.dylib         0x00007fff6edd3b8b thread_start + 15

Thread 2:: Realm notification listener
0   libsystem_kernel.dylib          0x00007fff6ed19766 kevent + 10
1   org.cocoapods.Realm.macosx      0x000000010d7b2fa1 realm::_impl::ExternalCommitHelper::listen() + 147 (external_commit_helper.cpp:217)
2   org.cocoapods.Realm.macosx      0x000000010d7b3304 void* std::__1::__thread_proxy<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, realm::_impl::ExternalCommitHelper::ExternalCommitHelper(realm::_impl::RealmCoordinator&)::$_0> >(void*) + 46 (thread:286)
3   libsystem_pthread.dylib         0x00007fff6edd8109 _pthread_start + 148
4   libsystem_pthread.dylib         0x00007fff6edd3b8b thread_start + 15

Thread 3 Crashed:: Dispatch queue: com.yannickloriot.asyncqueue
0   org.cocoapods.Realm.macosx      0x000000010db4207d realm::util::EncryptedFileMapping::read_barrier(void const*, unsigned long, unsigned long (*)(char const*)) + 29
1   org.cocoapods.Realm.macosx      0x000000010da214f4 realm::util::do_encryption_read_barrier(void const*, unsigned long, unsigned long (*)(char const*), realm::util::EncryptedFileMapping*) + 68
2   org.cocoapods.Realm.macosx      0x000000010dacb0fa realm::StringData realm::ConstObj::_get<realm::StringData>(realm::ColKey::Idx) const + 442
3   org.cocoapods.Realm.macosx      0x000000010d7f4926 ___ZN12_GLOBAL__N_115makeBoxedGetterIN5realm10StringDataEEEP11objc_objectm_block_invoke + 133 (RLMAccessor.mm:236)
4   com.parussoft.Poster            0x000000010d622363 specialized closure #1 in PostQueue.prepareStatus(for:) + 323 (PostQueue.swift:208)
5   com.parussoft.Poster            0x000000010d621bcf specialized PostQueue.run() + 2335 (PostQueue.swift:82)
6   com.parussoft.Poster            0x000000010d61c642 closure #2 in PostViewController2.postButtonClicked(_:) + 498 (PostViewController2.swift:211)
7   org.cocoapods.AwaitKit.macosx   0x000000010d6b1e4c thunk for @escaping @callee_guaranteed () -> (@error @owned Error) + 12
8   org.cocoapods.AwaitKit.macosx   0x000000010d6b1861 partial apply for thunk for @escaping @callee_guaranteed () -> (@error @owned Error) + 17
9   org.cocoapods.PromiseKit.macosx 0x000000010d6f7dd2 closure #1 in OS_dispatch_queue.async<A>(_:group:qos:flags:execute:) + 130 (Promise.swift:167)
10  org.cocoapods.PromiseKit.macosx 0x000000010d6d7d6e thunk for @escaping @callee_guaranteed () -> () + 14
11  libdispatch.dylib               0x00007fff6eb862b9 _dispatch_block_async_invoke2 + 83
12  libdispatch.dylib               0x00007fff6eb7a658 _dispatch_client_callout + 8
13  libdispatch.dylib               0x00007fff6eb7c818 _dispatch_continuation_pop + 414
14  libdispatch.dylib               0x00007fff6eb7bf16 _dispatch_async_redirect_invoke + 703
15  libdispatch.dylib               0x00007fff6eb88957 _dispatch_root_queue_drain + 326
16  libdispatch.dylib               0x00007fff6eb89097 _dispatch_worker_thread2 + 92
17  libsystem_pthread.dylib         0x00007fff6edd49f7 _pthread_wqthread + 220
18  libsystem_pthread.dylib         0x00007fff6edd3b77 start_wqthread + 15

Thread 4:
0   libsystem_pthread.dylib         0x00007fff6edd3b68 start_wqthread + 0

Thread 5:
0   libsystem_pthread.dylib         0x00007fff6edd3b68 start_wqthread + 0

Thread 6:
0   libsystem_pthread.dylib         0x00007fff6edd3b68 start_wqthread + 0

Thread 7:
0   libsystem_pthread.dylib         0x00007fff6edd3b68 start_wqthread + 0

Thread 8:
0   libsystem_pthread.dylib         0x00007fff6edd3b68 start_wqthread + 0

Thread 9:: com.apple.NSURLConnectionLoader
0   libsystem_kernel.dylib          0x00007fff6ed14dfa mach_msg_trap + 10
1   libsystem_kernel.dylib          0x00007fff6ed15170 mach_msg + 60
2   com.apple.CoreFoundation        0x00007fff34b39ef5 __CFRunLoopServiceMachPort + 247
3   com.apple.CoreFoundation        0x00007fff34b389c2 __CFRunLoopRun + 1319
4   com.apple.CoreFoundation        0x00007fff34b37e3e CFRunLoopRunSpecific + 462
5   com.apple.CFNetwork             0x00007fff3336fe32 0x7fff33325000 + 306738
6   com.apple.Foundation            0x00007fff371cb7a2 __NSThread__start__ + 1064
7   libsystem_pthread.dylib         0x00007fff6edd8109 _pthread_start + 148
8   libsystem_pthread.dylib         0x00007fff6edd3b8b thread_start + 15

Thread 3 crashed with X86 Thread State (64-bit):
  rax: 0x00000000000001a3  rbx: 0x0000600002a344c0  rcx: 0x000000010d7bbab0  rdx: 0x0000000000000008
  rdi: 0x000000000000018b  rsi: 0x00000bb4bbc1e1c0  rbp: 0x000070000141ee80  rsp: 0x000070000141ee30
   r8: 0x000000000007c1d4   r9: 0xffffffff00000000  r10: 0x0000600002a344d8  r11: 0x000000010d87af8e
  r12: 0x000000000000018b  r13: 0x00000bb4bbc1e1c0  r14: 0x000000010d7bbab0  r15: 0x0000000000000008
  rip: 0x000000010db4207d  rfl: 0x0000000000010206  cr2: 0x00000000000001a3

Logical CPU:     6
Error Code:      0x00000004 (no mapping for user data read)
Trap Number:     14

Binary Images:
       0x10d5dd000 -        0x10d670fff +com.parussoft.Poster (2.7.4 - 20200922) <A5A2DEE2-C6DE-3E86-8811-2F24E46528F3> /Applications/Poster 2.app/Contents/MacOS/Poster 2
       0x10d6ad000 -        0x10d6b4fff +org.cocoapods.AwaitKit.macosx (5.2.0 - 1) <4C657869-3CFF-393D-8EE4-CE19D96E3836> /Applications/Poster 2.app/Contents/Frameworks/AwaitKit.framework/Versions/A/AwaitKit
       0x10d6cb000 -        0x10d712fff +org.cocoapods.PromiseKit.macosx (6.13.1 - 1) <509DF963-FB9A-3927-97F3-ADAC00A149F5> /Applications/Poster 2.app/Contents/Frameworks/PromiseKit.framework/Versions/A/PromiseKit
       0x10d7a0000 -        0x10dcebfff +org.cocoapods.Realm.macosx (5.4.2 - 1) <70B7572D-A1E5-354E-9093-194A18A7BD2C> /Applications/Poster 2.app/Contents/Frameworks/Realm.framework/Versions/A/Realm
       0x10e0b3000 -        0x10e106ff7 +org.cocoapods.RealmSwift.macosx (5.4.2 - 1) <1AA9F287-024E-305F-98D9-61C97587D104> /Applications/Poster 2.app/Contents/Frameworks/RealmSwift.framework/Versions/A/RealmSwift
       0x10e217000 -        0x10e22afff +org.cocoapods.SnapKit.macosx (5.0.1 - 1) <6394365D-4389-3611-BF5F-3CB26D50D534> /Applications/Poster 2.app/Contents/Frameworks/SnapKit.framework/Versions/A/SnapKit
       0x10e27e000 -        0x10e2edfff +com.parussoft.SharingAPI (2.0 - 1) <7FA3E3E9-A7D5-38AC-AF2F-162A4B214A91> /Applications/Poster 2.app/Contents/Frameworks/SharingAPI.framework/Versions/A/SharingAPI
       0x111367000 -        0x11136a047  libobjc-trampolines.dylib (787.1) <88F9B648-C455-36F8-BBB9-7D1A9F57D073> /usr/lib/libobjc-trampolines.dylib
       0x11210b000 -        0x11219cf47  dyld (750.6) <1D318D60-C9B0-3511-BE9C-82AFD2EF930D> /usr/lib/dyld
    0x7fff27b81000 -     0x7fff27b90ff7  libSimplifiedChineseConverter.dylib (76) <07231027-C1CD-3E1D-A7A4-F717E91AA91D> /System/Library/CoreServices/Encodings/libSimplifiedChineseConverter.dylib
    0x7fff27ba8000 -     0x7fff27df5ff8  com.apple.RawCamera.bundle (9.02.0 - 1350.29) <59F81722-039E-33F5-A20E-936E997575A3> /System/Library/CoreServices/RawCamera.bundle/Contents/MacOS/RawCamera
    0x7fff27df8000 -     0x7fff27f26ff8  com.apple.AMDMTLBronzeDriver (3.10.18 - 3.1.0) <9FA4516E-D815-3347-AC25-84099A9D763E> /System/Library/Extensions/AMDMTLBronzeDriver.bundle/Contents/MacOS/AMDMTLBronzeDriver
    0x7fff30355000 -     0x7fff30550ff8  com.apple.avfoundation (2.0 - 1855.3) <0837D912-3783-35D6-A94A-E474E18600CF> /System/Library/Frameworks/AVFoundation.framework/Versions/A/AVFoundation
    0x7fff30551000 -     0x7fff3061dffe  com.apple.audio.AVFAudio (1.0 - 415.75) <CAC3CA5F-FCF6-37EB-8F1A-090340E2C38E> /System/Library/Frameworks/AVFoundation.framework/Versions/A/Frameworks/AVFAudio.framework/Versions/A/AVFAudio
    0x7fff3073d000 -     0x7fff3073dfff  com.apple.Accelerate (1.11 - Accelerate 1.11) <4F9977AE-DBDB-3A16-A536-AC1F9938DCDD> /System/Library/Frameworks/Accelerate.framework/Versions/A/Accelerate
    0x7fff3073e000 -     0x7fff30754fef  libCGInterfaces.dylib (524.2.1) <8FD09D09-BB19-36C5-ADE9-4F22DA235AEE> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vImage.framework/Versions/A/Libraries/libCGInterfaces.dylib
    0x7fff30755000 -     0x7fff30dabfff  com.apple.vImage (8.1 - 524.2.1) <EA6F5FF2-7A1B-35D5-A5A3-D2B3386ECB75> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vImage.framework/Versions/A/vImage
    0x7fff30dac000 -     0x7fff31013ff7  libBLAS.dylib (1303.60.1) <C6C2D42F-7456-3DBF-8BE2-9AA06EFC78FD> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
    0x7fff31014000 -     0x7fff314e7fef  libBNNS.dylib (144.100.2) <99C61C48-B14C-3DA6-8C31-6BF72DA0A3A9> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBNNS.dylib
    0x7fff314e8000 -     0x7fff31883fff  libLAPACK.dylib (1303.60.1) <5E3E3867-50C3-3E6A-9A2E-007CE77A4641> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libLAPACK.dylib
    0x7fff31884000 -     0x7fff31899fec  libLinearAlgebra.dylib (1303.60.1) <3D433800-0099-33E0-8C81-15F83247B2C9> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libLinearAlgebra.dylib
    0x7fff3189a000 -     0x7fff3189fff3  libQuadrature.dylib (7) <371F36A7-B12F-363E-8955-F24F7C2048F6> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libQuadrature.dylib
    0x7fff318a0000 -     0x7fff31910fff  libSparse.dylib (103) <B8A10D0C-4577-343D-B310-A3E81265D107> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libSparse.dylib
    0x7fff31911000 -     0x7fff31923fef  libSparseBLAS.dylib (1303.60.1) <B147FEF6-A0DB-3830-BF06-45BEC58DB576> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libSparseBLAS.dylib
    0x7fff31924000 -     0x7fff31afbfd7  libvDSP.dylib (735.140.1) <D63DC0A5-B8B4-3562-A574-E73BC3B57407> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvDSP.dylib
    0x7fff31afc000 -     0x7fff31bbefef  libvMisc.dylib (735.140.1) <3601FDE3-B142-398D-987D-8151A51F0A96> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvMisc.dylib
    0x7fff31bbf000 -     0x7fff31bbffff  com.apple.Accelerate.vecLib (3.11 - vecLib 3.11) <F6C5613D-2284-342B-9160-9731F78B4DE5> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/vecLib
    0x7fff31bc0000 -     0x7fff31c1fff0  com.apple.Accounts (113 - 113) <E2438070-30AB-3B89-AE63-1E485B92D108> /System/Library/Frameworks/Accounts.framework/Versions/A/Accounts
    0x7fff31d69000 -     0x7fff32b29ff2  com.apple.AppKit (6.9 - 1894.60.100) <A64D10A6-FE17-39CE-9392-6615BE54E10E> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
    0x7fff32b79000 -     0x7fff32b79fff  com.apple.ApplicationServices (48 - 50) <C23D2740-FAF6-3BD6-9E48-56F54D752864> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices
    0x7fff32b7a000 -     0x7fff32be5fff  com.apple.ApplicationServices.ATS (377 - 493.0.4.1) <87EA5DE1-506A-39FD-88BE-D8A3416C9012> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/ATS
    0x7fff32c7e000 -     0x7fff32cbcff0  libFontRegistry.dylib (274.0.5.1) <F3461C05-0370-359B-9F03-5C1C1F7763EC> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/Resources/libFontRegistry.dylib
    0x7fff32d17000 -     0x7fff32d46fff  com.apple.ATSUI (1.0 - 1) <5F513967-DDD7-3F22-AD14-8A38ABD9F2D0> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATSUI.framework/Versions/A/ATSUI
    0x7fff32d47000 -     0x7fff32d4bffb  com.apple.ColorSyncLegacy (4.13.0 - 1) <72EE68DB-F069-37F5-AA2A-40D5FCF139F4> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ColorSyncLegacy.framework/Versions/A/ColorSyncLegacy
    0x7fff32de5000 -     0x7fff32e3cffa  com.apple.HIServices (1.22 - 676) <14DF4D42-E24D-3EBD-9A9D-93124D8D6AA1> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/HIServices.framework/Versions/A/HIServices
    0x7fff32e3d000 -     0x7fff32e4bfff  com.apple.LangAnalysis (1.7.0 - 1.7.0) <01B8B6B3-E2C3-3607-B34A-8283A7E0E924> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/LangAnalysis.framework/Versions/A/LangAnalysis
    0x7fff32e4c000 -     0x7fff32e91ffa  com.apple.print.framework.PrintCore (15.4 - 516.2) <437BCF12-48D2-3770-8BC9-567718FB1BCA> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/PrintCore.framework/Versions/A/PrintCore
    0x7fff32e92000 -     0x7fff32e9cff7  com.apple.QD (4.0 - 413) <27A36D07-B5E9-32E6-87B6-3127F260F48D> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/QD.framework/Versions/A/QD
    0x7fff32e9d000 -     0x7fff32eaaffc  com.apple.speech.synthesis.framework (9.0.24 - 9.0.24) <75344F8F-32CA-3558-B4E6-F56D498250E4> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/SpeechSynthesis.framework/Versions/A/SpeechSynthesis
    0x7fff32eab000 -     0x7fff32f8cffa  com.apple.audio.toolbox.AudioToolbox (1.14 - 1.14) <8CFA0620-5E43-3C4D-A75B-981C0961C2DE> /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox
    0x7fff32f8e000 -     0x7fff32f8efff  com.apple.audio.units.AudioUnit (1.14 - 1.14) <C8F9CC56-F7CF-3E77-B6FC-BD8E1D19FA92> /System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit
    0x7fff33325000 -     0x7fff336b4ffa  com.apple.CFNetwork (1128.0.1 - 1128.0.1) <07F9CA9C-B954-3EA0-A710-3122BFF9F057> /System/Library/Frameworks/CFNetwork.framework/Versions/A/CFNetwork
    0x7fff33730000 -     0x7fff33730fff  com.apple.Carbon (160 - 162) <97E334B3-7FAE-3239-9E89-5A546BC26ADE> /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon
    0x7fff33731000 -     0x7fff33734ff3  com.apple.CommonPanels (1.2.6 - 101) <9F6E13D9-374B-386F-8E15-FDD6CE967859> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/CommonPanels.framework/Versions/A/CommonPanels
    0x7fff33735000 -     0x7fff33a29ff3  com.apple.HIToolbox (2.1.1 - 994.6) <EAF2DAC3-66B1-30BF-AF10-72DDA90D1044> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox
    0x7fff33a2a000 -     0x7fff33a2dff3  com.apple.help (1.3.8 - 71) <36483951-6F3E-3F7E-8A5B-191C2357EF17> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Help.framework/Versions/A/Help
    0x7fff33a2e000 -     0x7fff33a33ff7  com.apple.ImageCapture (9.0 - 1600.65) <1A1F320E-3E85-3F3D-8AE0-B238C4E92D40> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/ImageCapture.framework/Versions/A/ImageCapture
    0x7fff33a34000 -     0x7fff33a34fff  com.apple.ink.framework (10.15 - 227) <284507AE-EF47-3ABC-86A4-669243DB1D33> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Ink.framework/Versions/A/Ink
    0x7fff33a35000 -     0x7fff33a4fffa  com.apple.openscripting (1.7 - 185.1) <B6E28747-5FC7-3461-8A71-864A969ED022> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/OpenScripting.framework/Versions/A/OpenScripting
    0x7fff33a70000 -     0x7fff33a70fff  com.apple.print.framework.Print (15 - 271) <0D9FB08F-EA87-3BE7-821B-C61BA5601050> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Print.framework/Versions/A/Print
    0x7fff33a71000 -     0x7fff33a73ff7  com.apple.securityhi (9.0 - 55008) <390C6FAA-99BF-3924-9180-9EAE41D9C6BE> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SecurityHI.framework/Versions/A/SecurityHI
    0x7fff33a74000 -     0x7fff33a7afff  com.apple.speech.recognition.framework (6.0.3 - 6.0.3) <9614A01E-8303-3422-A3BA-6CE27540E09A> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SpeechRecognition.framework/Versions/A/SpeechRecognition
    0x7fff33a7b000 -     0x7fff33c13ffa  com.apple.cloudkit.CloudKit (867 - 867) <1B851180-FC00-357F-B6C1-BB0EA7D6D5CA> /System/Library/Frameworks/CloudKit.framework/Versions/A/CloudKit
    0x7fff33c14000 -     0x7fff33c14fff  com.apple.Cocoa (6.11 - 23) <2192EE61-8CA8-3639-B7D3-0D68F200C9EF> /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa
    0x7fff33c22000 -     0x7fff33d18fff  com.apple.ColorSync (4.13.0 - 3394.9) <A126406C-DA38-3FFE-8B25-BB9859EFD159> /System/Library/Frameworks/ColorSync.framework/Versions/A/ColorSync
    0x7fff33d19000 -     0x7fff33e09ff7  com.apple.combine (1.0 - 134.102) <02C5D48A-E70F-3D68-8555-4211853F9C3B> /System/Library/Frameworks/Combine.framework/Versions/A/Combine
    0x7fff33e0a000 -     0x7fff33f43ff6  com.apple.contacts (1.0 - 3455.18) <57696192-BF9D-3946-8C78-35FCEF406B00> /System/Library/Frameworks/Contacts.framework/Versions/A/Contacts
    0x7fff34003000 -     0x7fff3450cffb  com.apple.audio.CoreAudio (5.0 - 5.0) <9DA02E7A-56A0-3FFF-94C2-1795BA761F07> /System/Library/Frameworks/CoreAudio.framework/Versions/A/CoreAudio
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    0x7fff6e7ea000 -     0x7fff6e7ecff3  libswiftIOKit.dylib (??? - ???) <FD313708-AE48-3C72-A154-53EC839A8D55> /usr/lib/swift/libswiftIOKit.dylib
    0x7fff6e802000 -     0x7fff6e809f0f  libswiftMetal.dylib (??? - ???) <B3C74138-DE3C-3676-9983-F12757819C9C> /usr/lib/swift/libswiftMetal.dylib
    0x7fff6e885000 -     0x7fff6e888fe7  libswiftObjectiveC.dylib (??? - ???) <E668BD5D-E1D6-3C21-BA7E-5C3A672A964E> /usr/lib/swift/libswiftObjectiveC.dylib
    0x7fff6e89a000 -     0x7fff6e89ffbf  libswiftQuartzCore.dylib (??? - ???) <101D3E4D-231A-3CD8-97B4-4E37F4081CD2> /usr/lib/swift/libswiftQuartzCore.dylib
    0x7fff6e989000 -     0x7fff6e98bfff  libswiftXPC.dylib (??? - ???) <3CD547C3-7082-37EA-B289-F6BA6C4D4E26> /usr/lib/swift/libswiftXPC.dylib
    0x7fff6e993000 -     0x7fff6e9b4fff  libswiftsimd.dylib (??? - ???) <21EEA85D-EBBF-378C-8803-DCD904B93B68> /usr/lib/swift/libswiftsimd.dylib
    0x7fff6e9b5000 -     0x7fff6e9baff3  libcache.dylib (83) <AF488D13-9E89-35E0-B078-BE37CC5B8586> /usr/lib/system/libcache.dylib
    0x7fff6e9bb000 -     0x7fff6e9c6fff  libcommonCrypto.dylib (60165.120.1) <C7912BE5-993E-3581-B2A0-6AABDC8C5562> /usr/lib/system/libcommonCrypto.dylib
    0x7fff6e9c7000 -     0x7fff6e9cefff  libcompiler_rt.dylib (101.2) <49B8F644-5705-3F16-BBE0-6FFF9B17C36E> /usr/lib/system/libcompiler_rt.dylib
    0x7fff6e9cf000 -     0x7fff6e9d8ff7  libcopyfile.dylib (166.40.1) <3C481225-21E7-370A-A30E-0CCFDD64A92C> /usr/lib/system/libcopyfile.dylib
    0x7fff6e9d9000 -     0x7fff6ea6bfdb  libcorecrypto.dylib (866.140.1) <60567BF8-80FA-359A-B2F3-A3BAEFB288FD> /usr/lib/system/libcorecrypto.dylib
    0x7fff6eb78000 -     0x7fff6ebb8ff0  libdispatch.dylib (1173.100.2) <CD9C059C-91D9-30E8-8926-5B9CD0D5D4F5> /usr/lib/system/libdispatch.dylib
    0x7fff6ebb9000 -     0x7fff6ebeffff  libdyld.dylib (750.6) <789A18C2-8AC7-3C88-813D-CD674376585D> /usr/lib/system/libdyld.dylib
    0x7fff6ebf0000 -     0x7fff6ebf0ffb  libkeymgr.dylib (30) <DB3337BE-01CA-3425-BD0C-87774FC0CDC0> /usr/lib/system/libkeymgr.dylib
    0x7fff6ebf1000 -     0x7fff6ebfdff3  libkxld.dylib (6153.141.2) <EE8ECB4B-2EDB-3440-BBC1-6BDDDF5F1BCE> /usr/lib/system/libkxld.dylib
    0x7fff6ebfe000 -     0x7fff6ebfeff7  liblaunch.dylib (1738.140.1) <AFBCBDD3-0B55-3ECD-8E04-A73A3A57356B> /usr/lib/system/liblaunch.dylib
    0x7fff6ebff000 -     0x7fff6ec04ff7  libmacho.dylib (959.0.1) <AA613A9C-961A-3B67-B696-4622FA59FC4E> /usr/lib/system/libmacho.dylib
    0x7fff6ec05000 -     0x7fff6ec07ff3  libquarantine.dylib (110.40.3) <F234E51D-FD0B-3EE4-B679-AE3EE9C536C3> /usr/lib/system/libquarantine.dylib
    0x7fff6ec08000 -     0x7fff6ec09ff7  libremovefile.dylib (48) <7C7EFC79-BD24-33EF-B073-06AED234593E> /usr/lib/system/libremovefile.dylib
    0x7fff6ec0a000 -     0x7fff6ec21ff3  libsystem_asl.dylib (377.60.2) <1563EE02-0657-3B78-99BE-A947C24122EF> /usr/lib/system/libsystem_asl.dylib
    0x7fff6ec22000 -     0x7fff6ec22ff7  libsystem_blocks.dylib (74) <0D53847E-AF5F-3ACF-B51F-A15DEA4DEC58> /usr/lib/system/libsystem_blocks.dylib
    0x7fff6ec23000 -     0x7fff6ecaafff  libsystem_c.dylib (1353.100.2) <BBDED5E6-A646-3EED-B33A-91E4331EA063> /usr/lib/system/libsystem_c.dylib
    0x7fff6ecab000 -     0x7fff6ecaeffb  libsystem_configuration.dylib (1061.141.1) <0EE84C33-64FD-372B-974A-AF7A136F2068> /usr/lib/system/libsystem_configuration.dylib
    0x7fff6ecaf000 -     0x7fff6ecb2fff  libsystem_coreservices.dylib (114) <A199156E-058D-3ABB-BCE9-4B9F20DCED0F> /usr/lib/system/libsystem_coreservices.dylib
    0x7fff6ecb3000 -     0x7fff6ecbbfff  libsystem_darwin.dylib (1353.100.2) <5B12B5DB-3F30-37C1-8ECC-49A66B1F2864> /usr/lib/system/libsystem_darwin.dylib
    0x7fff6ecbc000 -     0x7fff6ecc3fff  libsystem_dnssd.dylib (1096.100.3) <EBB4C2C2-E031-3094-B40A-E67BF261D295> /usr/lib/system/libsystem_dnssd.dylib
    0x7fff6ecc4000 -     0x7fff6ecc5ffb  libsystem_featureflags.dylib (17) <29FD922A-EC2C-3F25-BCCC-B58D716E60EC> /usr/lib/system/libsystem_featureflags.dylib
    0x7fff6ecc6000 -     0x7fff6ed13ff7  libsystem_info.dylib (538) <8A321605-5480-330B-AF9E-64E65DE61747> /usr/lib/system/libsystem_info.dylib
    0x7fff6ed14000 -     0x7fff6ed40ff7  libsystem_kernel.dylib (6153.141.2) <A576A1CF-7726-3146-B04B-A26E1CDB9757> /usr/lib/system/libsystem_kernel.dylib
    0x7fff6ed41000 -     0x7fff6ed88fff  libsystem_m.dylib (3178) <00F331F1-0D09-39B3-8736-1FE90E64E903> /usr/lib/system/libsystem_m.dylib
    0x7fff6ed89000 -     0x7fff6edb0fff  libsystem_malloc.dylib (283.100.6) <8549294E-4C53-36EB-99F3-584A7393D8D5> /usr/lib/system/libsystem_malloc.dylib
    0x7fff6edb1000 -     0x7fff6edbeffb  libsystem_networkextension.dylib (1095.140.2) <F06C65C5-2CBE-313C-96E1-A09240F9FE57> /usr/lib/system/libsystem_networkextension.dylib
    0x7fff6edbf000 -     0x7fff6edc8ff7  libsystem_notify.dylib (241.100.2) <FA22F928-D91B-3AA5-96BB-3186AC0FB264> /usr/lib/system/libsystem_notify.dylib
    0x7fff6edc9000 -     0x7fff6edd1fef  libsystem_platform.dylib (220.100.1) <009A7C1F-313A-318E-B9F2-30F4C06FEA5C> /usr/lib/system/libsystem_platform.dylib
    0x7fff6edd2000 -     0x7fff6eddcfff  libsystem_pthread.dylib (416.100.3) <62CB1A98-0B8F-31E7-A02B-A1139927F61D> /usr/lib/system/libsystem_pthread.dylib
    0x7fff6eddd000 -     0x7fff6ede1ff3  libsystem_sandbox.dylib (1217.141.2) <051C4018-4345-3034-AC98-6DE42FB8273B> /usr/lib/system/libsystem_sandbox.dylib
    0x7fff6ede2000 -     0x7fff6ede4fff  libsystem_secinit.dylib (62.100.2) <F80872AA-E1FD-3D7E-8729-467656EC6561> /usr/lib/system/libsystem_secinit.dylib
    0x7fff6ede5000 -     0x7fff6edecffb  libsystem_symptoms.dylib (1238.120.1) <5820A2AF-CE72-3AB3-ABCC-273A3419FB55> /usr/lib/system/libsystem_symptoms.dylib
    0x7fff6eded000 -     0x7fff6ee03ff2  libsystem_trace.dylib (1147.120) <04B47629-847B-3D74-8ABE-C05EF9DEEFE4> /usr/lib/system/libsystem_trace.dylib
    0x7fff6ee05000 -     0x7fff6ee0aff7  libunwind.dylib (35.4) <42B7B509-BAFE-365B-893A-72414C92F5BF> /usr/lib/system/libunwind.dylib
    0x7fff6ee0b000 -     0x7fff6ee40ffe  libxpc.dylib (1738.140.1) <3E243A41-030F-38E3-9FD2-7B38C66C35B1> /usr/lib/system/libxpc.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 193
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 89974
    thread_create: 0
    thread_set_state: 90

VM Region Summary:
ReadOnly portion of Libraries: Total=762.8M resident=0K(0%) swapped_out_or_unallocated=762.8M(100%)
Writable regions: Total=686.0M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=686.0M(100%)

                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Accelerate framework               512K        4 
Activity Tracing                   256K        1 
CG backing stores                 1984K        2 
CG image                          9396K       11 
CG raster data                      16K        2 
CoreAnimation                     38.4M       67 
CoreGraphics                         8K        1 
CoreImage                           84K        8 
CoreUI image data                 1740K       16 
Foundation                         940K        3 
Image IO                           408K       12 
Kernel Alloc Once                    8K        1 
MALLOC                           238.0M       77 
MALLOC guard page                   48K       10 
MALLOC_NANO (reserved)           384.0M        1         reserved VM address space (unallocated)
SQLite page cache                   64K        1 
STACK GUARD                       56.0M       10 
Stack                             12.6M       10 
VM_ALLOCATE                        312K       21 
__DATA                            50.1M      478 
__DATA_CONST                       302K       24 
__FONT_DATA                          4K        1 
__LINKEDIT                       394.5M       16 
__OBJC_RO                         32.3M        1 
__OBJC_RW                         1908K        2 
__TEXT                           368.4M      466 
__UNICODE                          564K        1 
libnetwork                         128K        8 
mapped file                      404.6M       50 
shared memory                      648K       17 
===========                     =======  ======= 
TOTAL                              2.0G     1322 
TOTAL, minus reserved VM space     1.6G     1322 

Model: iMac15,1, BootROM 235.0.0.0.0, 4 processors, Quad-Core Intel Core i7, 4 GHz, 16 GB, SMC 2.22f16
Graphics: kHW_AMDRadeonR9M290XItem, AMD Radeon R9 M290X, spdisplays_pcie_device, 2 GB
Memory Module: BANK 0/DIMM1, 8 GB, DDR3, 1600 MHz, 0x04CB, 0x202020202020202020202020202020202020
Memory Module: BANK 1/DIMM1, 8 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3831554738424255302D474E2D4620
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x142), Broadcom BCM43xx 1.0 (7.77.111.1 AirPortDriverBrcmNIC-1615.2)
Bluetooth: Version 7.0.6f7, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: APPLE SSD SM0256F, 251 GB
USB Device: USB 3.0 Bus
USB Device: USB3.0 Hub
USB Device: Expansion
USB Device: CSS25U36G
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: FaceTime HD Camera (Built-in)
USB Device: USB2.0 Hub
USB Device: Gaming Mouse G502
Thunderbolt Bus: iMac, Apple Inc., 26.1
``

[owenzhao]

This issue https://github.com/realm/realm-cocoa/issues/6556 was marked "Probably fixed by realm/realm-core#3828." by @tgoyne. But now it is clear that it still exists.

[leemaguire]

@owenzhao Can you update to 5.4.6 and see if it solves your issue, also can you give us a reproduction case? Thanks

[leemaguire]

@Endore8 Can you post a complete code sample to help reproduce this issue? Thanks

[endore8]

@leemaguire , although yesterday it seemed to work fine, today I experienced the same crash a few times again 😭

This is a code sample copied from the codebase. Don't know if that matters, but it is run in a background thread.

if let speedHistory = realm?.objects(ConnectionSpeedRecord.self).sorted(byKeyPath: "timestamp") {

    if speedHistory.count > NetworkConfig.speedHistoryValuesLimit {
        try? realm?.write {
            (0..<(speedHistory.count - NetworkConfig.speedHistoryValuesLimit)).forEach {
                realm?.delete(speedHistory[$0])
            }
        }
    }

    let mapped = Array(speedHistory.map { ($0.down, $0.up) }) // This line crashes.
    let speedHistoryMaxValue = (mapped.map { max($0.0, $0.1) }.max() ?? 0)
    let downloadSpeedRelativeHistory = Array(mapped.map { CGFloat($0.0) / CGFloat(speedHistoryMaxValue) })
    let uploadSpeedRelativeHistory = Array(mapped.map { CGFloat($0.1) / CGFloat(speedHistoryMaxValue) })

[owenzhao]

@owenzhao Can you update to 5.4.6 and see if it solves your issue, also can you give us a reproduction case? Thanks

It is hard to reproduce this issue as it happens randomly. I had tried to reproduce it at the moment when it happened with the same situation and it didn't happen again. However, this also proved that it was something related to concurrent threads like situation, which sometimes code didn't work in the order expected. Maybe focusing on the crashed queue Dispatch queue: com.yannickloriot.asyncqueue will help.

[owenzhao]

@leemaguire I just had a look on the revised history of realm-core/src/realm/db.cpp. I found that this file was changed on https://github.com/realm/realm-core/pull/3828/files to fixed the issue we talking. Then the line that fixed the issue was revised by https://github.com/realm/realm-core/commit/90a4fe39a8b160c1dee0c4907275e0810df5d765#diff-1cdb349fd195d488a6ddbf55865d8ace to fixed another crashing issue. Maybe you should take a look on that and see if it was a regression.

[jedelbo]

I can see that the problem reported by @Endore8 and the problem reported reported by @owenzhao is not the same. If we concentrate on the first problem, then @Endore8 says that "Once it crashes once, it starts crashing continuously.". This suggest that you have a realm file that causes this behavior. RIght?

[owenzhao]

I can see that the problem reported by @Endore8 and the problem reported reported by @owenzhao is not the same. If we concentrate on the first problem, then @Endore8 says that "Once it crashes once, it starts crashing continuously.". This suggest that you have a realm file that causes this behavior. RIght?

I don't think "continuously" here means constantly. As in the very top, he said "Application getting crash intermittently after upgraded to version 5.3.6 and 5.4.0." So the "continuously" here meant the crash was more frequently. However, in my case the crash was not rare and random. Maybe that depending on the system situation or CPU loads.

[ganesh-ananthan]

@finnschiermer Is this fixed in any of the PR ?

[gshahbazian]

We are also seeing this crash:

Crashed: com.apple.main-thread
0  Superhuman                     0x1031b2e5c realm::util::EncryptedFileMapping::read_barrier(void const*, unsigned long, unsigned long (*)(char const*)) + 96340
1  Superhuman                     0x102dd8578 realm::util::do_encryption_read_barrier(void const*, unsigned long, unsigned long (*)(char const*), realm::util::EncryptedFileMapping*) + 554 (thread.hpp:554)
2  Superhuman                     0x1030634d4 realm::ArrayUnsigned::init_from_ref(unsigned long) + 37892
3  Superhuman                     0x103064ab4 realm::BPlusTreeInner::init_from_ref(unsigned long) + 43492
4  Superhuman                     0x10309d970 realm::Lst<realm::ObjKey>::Lst(realm::Lst<realm::ObjKey> const&) + 340
5  Superhuman                     0x1030c3348 realm::LnkLst::LnkLst(realm::LnkLst const&) + 10360
6  Superhuman                     0x10310d6b0 realm::Query::Query(realm::Query const&) + 75968
7  Superhuman                     0x10331d558 realm::Results::Results(realm::Results const&) + 5312
8  Superhuman                     0x1033231c4 realm::Results::snapshot() const & + 28972
9  Superhuman                     0x102dd3ed8 -[RLMFastEnumerator detach] + 104 (RLMCollection.mm:104)
10 Superhuman                     0x102e5ec50 -[RLMRealm detachAllEnumerators] + 987 (RLMRealm.mm:987)
11 Superhuman                     0x102e62c2c (anonymous namespace)::RLMNotificationHelper::get_observed_rows() + 115 (RLMRealmUtil.mm:115)
12 Superhuman                     0x1032f0568 realm::_impl::transaction::advance(std::__1::shared_ptr<realm::Transaction> const&, realm::BindingContext*, realm::_impl::NotifierPackage&) + 1396576
13 Superhuman                     0x1032e7864 realm::_impl::RealmCoordinator::advance_to_ready(realm::Realm&) + 1360476
14 Superhuman                     0x10333bc70 realm::Realm::notify() + 130008
15 Superhuman                     0x1032f90f8 std::__1::__function::__func<realm::_impl::WeakRealmNotifier::bind_to_scheduler()::$_0, std::__1::allocator<realm::_impl::WeakRealmNotifier::bind_to_scheduler()::$_0>, void ()>::operator()() + 1432304
16 CoreFoundation                 0x1a866c76c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28
17 CoreFoundation                 0x1a866c668 __CFRunLoopDoSource0 + 208
18 CoreFoundation                 0x1a866b960 __CFRunLoopDoSources0 + 268
19 CoreFoundation                 0x1a8665a8c __CFRunLoopRun + 824
20 CoreFoundation                 0x1a866521c CFRunLoopRunSpecific + 600
21 GraphicsServices               0x1bf6e4784 GSEventRunModal + 164
22 UIKitCore                      0x1ab09e200 -[UIApplication _run] + 1072
23 UIKitCore                      0x1ab0a3a74 UIApplicationMain + 168
24 Superhuman                     0x1023c1b24 main + 4367702820 (<compiler-generated>:4367702820)
25 libdyld.dylib                  0x1a83256c0 start + 4

[jimmyhzhang]

Still seeing this crash with 5.5.0. Is there anyone who can help look into this @leemaguire, or anyone who can help us figure out a path forward? We'd be more than happy to provide sysdiagnose and crash logs if that's helpful. Thanks!

Crashed: com.apple.main-thread 0 TestV4 0x1016e2820 realm::util::EncryptedFileMapping::read_barrier(void const, unsigned long, unsigned long ()(char const)) + 106372 1 TestV4 0x101147e14 realm::util::do_encryption_read_barrier(void const, unsigned long, unsigned long ()(char const), realm::util::EncryptedFileMapping) + 553 (thread.hpp:553) 2 TestV4 0x10162e024 realm::ArrayUnsigned::init_from_ref(unsigned long) + 493348 3 TestV4 0x10162ed44 realm::Cluster::init(realm::MemRef) + 496708 4 TestV4 0x1016a311c realm::ParentNode::match(realm::ConstObj&) + 27056 5 TestV4 0x10154e9d0 realm::util::FunctionRef<bool (realm::ConstObj&)>::FunctionRef<realm::Query::find_all(realm::ConstTableView&, unsigned long, unsigned long, unsigned long) const::$_3>(realm::Query::find_all(realm::ConstTableView&, unsigned long, unsigned long, unsigned long) const::$_3&&)::'lambda'(void, realm::ConstObj&)::invoke(void*, realm::ConstObj&) + 417088 6 TestV4 0x1016a6098 realm::StringNode::index_based_aggregate(unsigned long, realm::util::FunctionRef<bool (realm::ConstObj&)>) + 39212 7 TestV4 0x10154a2dc realm::Query::find_all(realm::ConstTableView&, unsigned long, unsigned long, unsigned long) const + 398924 8 TestV4 0x1016d78b8 realm::ConstTableView::do_sync() + 61468 9 TestV4 0x10154a38c realm::Query::find_all(unsigned long, unsigned long, unsigned long) + 399100 10 TestV4 0x10154a790 realm::Query::find_all(realm::DescriptorOrdering const&) + 400128 11 TestV4 0x10113553c realm::Results::do_evaluate_query_if_needed(bool) + 383 (results.cpp:383) 12 TestV4 0x1011350b4 realm::util::Optional realm::Results::try_get(unsigned long) + 307 (results.cpp:307) 13 TestV4 0x101135324 realm::util::Optional realm::Results::first() + 140 (__mutex_base:140) 14 TestV4 0x1011db53c RLMAccessorContext realm::Results::dispatch<auto realm::Results::first(RLMAccessorContext&)::'lambda'(RLMAccessorContext&)>(RLMAccessorContext&) const + 402 (optional.hpp:402) 15 TestV4 0x1011db344 auto realm::Results::first(RLMAccessorContext&) + 343 (results.hpp:343) 16 TestV4 0x1011d9194 -[RLMResults firstObject] + 228 (RLMResults.mm:228) 17 TestV4 0x1013f25e8 -[RealmAccessHelper valueForIdentifier:] + 174 (RealmAccessHelper.m:174) 18 TestV4 0x1013e936c +[ConfigData remoteNotificationToken] + 111 (ConfigData.m:111) 19 TestV4 0x100c4c56c CalendarSync.getCalendarSyncData(reason:) + 89 (CalendarSync.swift:89) 20 TestV4 0x100c4f5f0 partial apply for closure #1 in CalendarSync.performCalendarSync(reason:forceSync:success:failure:) + 54 (CalendarSync.swift:54) 21 TestV4 0x100c25504 thunk for @escaping @callee_guaranteed () -> () + 4337292548 (:4337292548) 22 libdispatch.dylib 0x1828c424c _dispatch_call_block_and_release + 32 23 libdispatch.dylib 0x1828c5db0 _dispatch_client_callout + 20 24 libdispatch.dylib 0x1828d37ac _dispatch_main_queue_callback_4CF + 836 25 CoreFoundation 0x182c4d11c CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 16 26 CoreFoundation 0x182c47120 CFRunLoopRun + 2508 27 CoreFoundation 0x182c4621c CFRunLoopRunSpecific + 600 28 GraphicsServices 0x19a74a784 GSEventRunModal + 164 29 UIKitCore 0x185684fe0 -[UIApplication _run] + 1072 30 UIKitCore 0x18568a854 UIApplicationMain + 168 31 TestV4 0x100c23a7c main + 21 (main.m:21) 32 libdyld.dylib 0x1829066b0 start + 4

[f3n1kc]

Getting similar crash on version 5.4.8:

• not using encryption
• realm file is kept in shared group directory
• from firebase logs it seems to happens only after app enters background
• we use timer to call function via #selector. Inside function we try to load Realm object using its primary key
• crashes on iOS 12 - 14

Crashed: com.apple.main-thread 0 Realm 0x1018ee1ec realm::util::EncryptedFileMapping::read_barrier(void const, unsigned long, unsigned long ()(char const)) + 32 1 Realm 0x1015dd964 realm::util::do_encryption_read_barrier(void const, unsigned long, unsigned long ()(char const), realm::util::EncryptedFileMapping) + 553 (thread.hpp:553) 2 Realm 0x10180ca98 realm::ClusterNodeInner::find_child(realm::ObjKey, realm::ClusterNodeInner::ChildInfo&) const + 700 3 Realm 0x10180c810 realm::ClusterNodeInner::try_get(realm::ObjKey, realm::ClusterNode::State&) const + 52 4 Realm 0x101815900 realm::ClusterTree::is_valid(realm::ObjKey) const + 36 5 Realm 0x1018ce9a4 realm::ObjKey realm::Table::find_first(realm::ColKey, realm::StringData) const + 412 6 Realm 0x10164686c realm::ObjKey realm::Object::get_for_primary_key_impl<objc_object strong, RLMAccessorContext>(RLMAccessorContext&, realm::Table const&, realm::Property const&, objc_object __strong) + 337 (object_accessor.hpp:337) 7 Realm 0x101646480 realm::Object realm::Object::get_for_primary_key<objc_object strong, RLMAccessorContext>(RLMAccessorContext&, std::1::shared_ptr const&, realm::ObjectSchema const&, objc_object* strong) + 325 (object_accessor.hpp:325) 8 Realm 0x1016461dc RLMGetObject + 257 (RLMObjectStore.mm:257) 9 RealmSwift 0x101babc94 Realm.object<A, B>(ofType:forPrimaryKey:) + 645 (Realm.swift:645)

[xilin]

Is there any update on this issue? We still see similar crash on version 5.5.0. There is still realm::util::EncryptedFileMapping::read_barrier in the stack, while we aren't using encryption. And what we do is just a simple call to get firstObject:

RLMResults<RealmItem *> *results = [RealmItem objectsInRealm:realm where:@"xxx_key = %@", identifier];
RealmItem *item = [results firstObject];

Trace:

0  Test                          0x105146904 realm::util::EncryptedFileMapping::read_barrier(void const*, unsigned long, unsigned long (*)(char const*)) + 106372
1  Test                          0x104bab244 realm::util::do_encryption_read_barrier(void const*, unsigned long, unsigned long (*)(char const*), realm::util::EncryptedFileMapping*) + 553 (thread.hpp:553)
2  Test                          0x105092108 realm::ArrayUnsigned::init_from_ref(unsigned long) + 493348
3  Test                          0x105092e28 realm::Cluster::init(realm::MemRef) + 496708
4  Test                          0x105107200 realm::ParentNode::match(realm::ConstObj&) + 27056
5  Test                          0x104fb2ab4 realm::util::FunctionRef<bool (realm::ConstObj&)>::FunctionRef<realm::Query::find_all(realm::ConstTableView&, unsigned long, unsigned long, unsigned long) const::$_3>(realm::Query::find_all(realm::ConstTableView&, unsigned long, unsigned long, unsigned long) const::$_3&&)::'lambda'(void*, realm::ConstObj&)::__invoke(void*, realm::ConstObj&) + 426020
6  Test                          0x10510a17c realm::StringNode<realm::Equal>::index_based_aggregate(unsigned long, realm::util::FunctionRef<bool (realm::ConstObj&)>) + 39212
7  Test                          0x104fae3c0 realm::Query::find_all(realm::ConstTableView&, unsigned long, unsigned long, unsigned long) const + 407856
8  Test                          0x10513b99c realm::ConstTableView::do_sync() + 61468
9  Test                          0x104fae470 realm::Query::find_all(unsigned long, unsigned long, unsigned long) + 408032
10 Test                          0x104fae874 realm::Query::find_all(realm::DescriptorOrdering const&) + 409060
11 Test                          0x104b9896c realm::Results::do_evaluate_query_if_needed(bool) + 383 (results.cpp:383)
12 Test                          0x104b984e4 realm::util::Optional<realm::Obj> realm::Results::try_get<realm::Obj>(unsigned long) + 307 (results.cpp:307)
13 Test                          0x104b98754 realm::util::Optional<realm::Obj> realm::Results::first<realm::Obj>() + 140 (__mutex_base:140)
14 Test                          0x104c3e96c RLMAccessorContext realm::Results::dispatch<auto realm::Results::first<RLMAccessorContext>(RLMAccessorContext&)::'lambda'(RLMAccessorContext&)>(RLMAccessorContext&) const + 402 (optional.hpp:402)
15 Test                          0x104c3e774 auto realm::Results::first<RLMAccessorContext>(RLMAccessorContext&) + 343 (results.hpp:343)
16 Test                          0x104c3c5c4 -[RLMResults firstObject] + 228 (RLMResults.mm:228)

[jsflax]

@xilin This has been fixed in version 10.x. We do not currently have plans to backport the fix. Would you be able to upgrade to the latest version of Realm and see if that removes the crash?

[thanhan123]

@jsflax we encountered this issue more frequent recently, could you help check?

/Users/realm/workspace/realm_realm-core_release_10.6.0/src/realm/util/encrypted_file_mapping.hpp:150: [realm-core-10.6.0] Assertion failed: local_ndx < m_page_state.size() with (local_ndx, m_page_state.size()) =  [1961, 128]
0   Realm                               0x00000001138fd29c _ZN5realm4utilL18terminate_internalERNSt3__118basic_stringstreamIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE + 28
1   Realm                               0x00000001138fd7e7 _ZN5realm4util19terminate_with_infoEPKcS2_lS2_OSt16initializer_listINS0_9PrintableEE + 471
2   Realm                               0x0000000113785176 _ZN5realm4util19terminate_with_infoIJRmmEEEvPKciS4_S4_DpOT_ + 70
3   Realm                               0x00000001138dcad0 _ZNSt3__16vectorIbNS_9allocatorIbEEE6resizeEmb + 0
4   Realm                               0x000000011345a100 _ZN5realm4util26do_encryption_read_barrierEPKvmPFmPKcEPNS0_20EncryptedFileMappingE + 64
5   Realm                               0x000000011373ce33 _ZN5realm13BPlusTreeBase20create_root_from_refEm + 531
6   Realm                               0x0000000113785a30 _ZN5realm3LstINS_6ObjKeyEEC2ERKS2_ + 464
7   Realm                               0x00000001137b0ae0 _ZN5realm6LnkLstC2ERKS0_ + 224
8   Realm                               0x00000001137aefdd _ZNK5realm6LnkLst14clone_linklistEv + 157
9   Realm                               0x00000001137f7a8a _ZN5realm5QueryC2ERKS0_ + 266
10  Realm                               0x000000011381b402 _ZN5realm14ConstTableViewC2ENS_13ConstTableRefERNS_5QueryEmmm + 162
11  Realm                               0x000000011381415b _ZN5realm5Query8find_allEmmm + 75
12  Realm                               0x00000001139ec884 _ZN5realm5_impl15ResultsNotifier3runEv + 1124
13  Realm                               0x00000001139e2e19 _ZN5realm5_impl16RealmCoordinator19run_async_notifiersEv + 3801
14  Realm                               0x00000001139e1eb3 _ZN5realm5_impl16RealmCoordinator9on_changeEv + 19
15  Realm                               0x00000001139c6ce9 _ZN5realm5_impl20ExternalCommitHelper6listenEv + 217
16  Realm                               0x00000001139c6e4e _ZNSt3__1L14__thread_proxyINS_5tupleIJNS_10unique_ptrINS_15__thread_structENS_14default_deleteIS3_EEEEZN5realm5_impl20ExternalCommitHelperC1ERNS8_16RealmCoordinatorEE3$_0EEEEEPvSE_ + 46
17  libsystem_pthread.dylib             0x00007fff60c8e109 _pthread_start + 148
18  libsystem_pthread.dylib             0x00007fff60c89b8b thread_start + 15!!! IMPORTANT: Please report this at https://github.com/realm/realm-core/issues/new/choose2021-05-12 15:58:34.798064+0900 AppName[13183:216096] /Users/realm/workspace/realm_realm-core_release_10.6.0/src/realm/util/encrypted_file_mapping.hpp:150: [realm-core-10.6.0] Assertion failed: local_ndx < m_page_state.size() with (local_ndx, m_page_state.size()) =  [1961, 128]
0   Realm                               0x00000001138fd29c _ZN5realm4utilL18terminate_internalERNSt3__118basic_stringstreamIcNS1_11char_traitsIcEENS1_9allocatorIcEEEE + 28
1   Realm                               0x00000001138fd7e7 _ZN5realm4util19terminate_with_infoEPKcS2_lS2_OSt16initializer_listINS0_9PrintableEE + 471
2   Realm                               0x0000000113785176 _ZN5realm4util19terminate_with_infoIJRmmEEEvPKciS4_S4_DpOT_ + 70
3   Realm                               0x00000001138dcad0 _ZNSt3__16vectorIbNS_9allocatorIbEEE6resizeEmb + 0
4   Realm                               0x000000011345a100 _ZN5realm4util26do_encryption_read_barrierEPKvmPFmPKcEPNS0_20EncryptedFileMappingE + 64
5   Realm                               0x000000011373ce33 _ZN5realm13BPlusTreeBase20create_root_from_refEm + 531
6   Realm                               0x0000000113785a30 _ZN5realm3LstINS_6ObjKeyEEC2ERKS2_ + 464
7   Realm                               0x00000001137b0ae0 _ZN5realm6LnkLstC2ERKS0_ + 224
8   Realm                               0x00000001137aefdd _ZNK5realm6LnkLst14clone_linklistEv + 157
9   Realm                               0x00000001137f7a8a _ZN5realm5QueryC2ERKS0_ + 266
10  Realm                               0x000000011381b402 _ZN5realm14ConstTableViewC2ENS_13ConstTableRefERNS_5QueryEmmm + 162
11  Realm                               0x000000011381415b _ZN5realm5Query8find_allEmmm + 75
12  Realm                               0x00000001139ec884 _ZN5realm5_impl15ResultsNotifier3runEv + 1124
13  Realm                               0x00000001139e2e19 _ZN5realm5_impl16RealmCoordinator19run_async_notifiersEv + 3801
14  Realm                               0x00000001139e1eb3 _ZN5realm5_impl16RealmCoordinator9on_changeEv + 19
15  Realm                               0x00000001139c6ce9 _ZN5realm5_impl20ExternalCommitHelper6listenEv + 217
16  Realm                               0x00000001139c6e4e _ZNSt3__1L14__thread_proxyINS_5tupleIJNS_10unique_ptrINS_15__thread_structENS_14default_deleteIS3_EEEEZN5realm5_impl20ExternalCommitHelperC1ERNS8_16RealmCoordinatorEE3$_0EEEEEPvSE_ + 46
17  libsystem_pthread.dylib             0x00007fff60c8e109 _pthread_start + 148
18  libsystem_pthread.dylib             0x00007fff60c89b8b thread_start + 15!!! IMPORTANT: Please report this at https://github.com/realm/realm-core/issues/new/choose

The code lead to this crash (executed in background thread):

realm?.object(ofType: SomeObject.self, forPrimaryKey: id)

[jsflax]

Is there any more context to that code? What's running on the main thread? The more information, the better 😄 .

cc'ing @finnschiermer

[thanhan123]

Is there any more context to that code? What's running on the main thread? The more information, the better 😄 .

cc'ing @finnschiermer

For more information: In the app we used Realm.Configuration(encryptionKey: realmDataKey)

realm?.object(ofType: SomeObject.self, forPrimaryKey: id)

The code above actually run on main thread. (Sorry for misinformation)

The context: We fetch new messages from server -> save it to database -> get the latest message (from database and on later main thread runloop) to display in UI.

[finnschiermer]

@thanhan123 Which version of Realm are you using?

[thanhan123]

@finnschiermer I used Realm version 10.7.4

[finnschiermer]

@thanhan123 you wrote: "In the app we used Realm.Configuration(encryptionKey: realmDataKey)"

Does this mean that you are using encryption? Or that you are not? (I'm not entirely familiar with the way Realm is configured in the Cocoa SDK. )

[thanhan123]

Does this mean that you are using encryption? Or that you are not?

It means that I am using encryption in my app.

[finnschiermer]

@thanhan123 Can you reproduce it reliably? If so, is there any way for us to get a repro-case from you?

[ejm01]

@thanhan123 Are you able to provide Finn with this?

[mylesbarros]

I'm experiencing this error as well, it consistently occurs when the app's memory usage gets very high.

Specifically, we have an in-app stream that makes network requests, writes the result to Realm, and then reads it back and displays it in the stream. If the user hits somewhere between 400MB-600MB of memory usage, the app hits this error.

What's interesting is what appears just before the crash stack trace in the log, /Users/realm/workspace/realm_realm-core_release_10.5.0/src/realm/util/encrypted_file_mapping.hpp:150: [realm-core-10.5.0] Assertion failed: local_ndx < m_page_state.size() with (local_ndx, m_page_state.size()) = [2835, 2816] This assertion failure is present every time the app crashes.

Not sure if it's helpful but the debugger reports the following on crash,

In this crash the m_page_state has 2816 entries. That's pretty standard for the crashes I see, though the largest had 3711 and the smallest had 639.

Hopefully that's not all just noise, seeing the crashes though I thought it might be related to the process' address space.

[thanhan123]

@finnschiermer Sorry but somehow I cannot reproduce this bug with simpler project. I made one to mimic my current project but it doesn't crash at all.

[finnschiermer]

We need a repro case to make progress, I'm afraid. Extended testing has not hit this.

[no-response[bot]]

This issue has been automatically closed because there has been no response to our request for more information from the original author. With only the information that is currently in the issue, we don't have enough information to take action. Please reach out if you have or find the answers we need so that we can investigate further.

[xilin]

@xilin This has been fixed in version 10.x. We do not currently have plans to backport the fix. Would you be able to upgrade to the latest version of Realm and see if that removes the crash?

@jsflax sorry for late reply. We've upgrade to 10.x and the problem has gone. Thanks!